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LCD Control
Using the C505L
2 of 25
AP0829 05.99
1 Introduction....................................................................................................................3
2 Theory of Liquid Crystal Displays................................................................................3
2.1 Structure of Liquid Crystal Displays..............................................................................3
2.2 Multiple Backplanes to Reduce the Pin Count..............................................................6
3 Control of LCDs.............................................................................................................7
4 LCD Controller of the C505L.......................................................................................11
5 Connecting an LCD to the C505L...............................................................................12
6 The Application............................................................................................................14
6.1 Hardware and Connections ........................................................................................14
6.2 Software Algorithms....................................................................................................15
Appendix ......................................................................................................................17
Main.c........................................................................................................................17
LCD.c ........................................................................................................................19
Putchar.c...................................................................................................................19
LCD.h........................................................................................................................21
Reg505l.h..................................................................................................................22
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AP0829 ApNote - Revision History
Actual Revision : Rel.02 Previous Revision: Rel.01
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actual Rel.
prev. Rel.
Real Time Clock Description, References and Code Removed
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